.auth-container {
  max-width: 480px;
  margin: 80px auto;
  padding: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--gray-200);
  overflow: hidden;
  position: relative;
}

.auth-container::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(
    90deg,
    var(--primary),
    var(--secondary),
    var(--accent)
  );
}

.auth-header {
  text-align: center;
  padding: 40px 40px 0;
  margin-bottom: 32px;
  background: linear-gradient(
    135deg,
    rgba(79, 70, 229, 0.05) 0%,
    rgba(124, 58, 237, 0.03) 100%
  );
}

.auth-header h1 {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 12px;
  background: linear-gradient(
    135deg,
    var(--primary) 0%,
    var(--secondary) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.01em;
}

.auth-header p {
  color: var(--gray-600);
  font-size: 1.1rem;
  margin-bottom: 0;
  line-height: 1.6;
}

form {
  padding: 0 40px 40px;
}

.form-group {
  margin-bottom: 24px;
  position: relative;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--gray-700);
  font-size: 0.95rem;
  letter-spacing: 0.01em;
}

.form-control {
  width: 100%;
  padding: 16px 20px;
  border: 2px solid var(--gray-200);
  border-radius: var(--border-radius);
  font-size: 1rem;
  transition: var(--transition);
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  color: var(--gray-900);
  position: relative;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
  outline: none;
  background: white;
  transform: translateY(-1px);
}

.form-control:hover {
  border-color: var(--gray-300);
  background: rgba(255, 255, 255, 0.9);
}

.form-control::placeholder {
  color: var(--gray-400);
}

.form-footer {
  margin-top: 32px;
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid var(--gray-200);
}

.form-footer a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  position: relative;
}

.form-footer a::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transition: width 0.3s ease;
}

.form-footer a:hover {
  color: var(--primary-dark);
}

.form-footer a:hover::after {
  width: 100%;
}

.btn-block {
  width: 100%;
  padding: 16px 24px;
  font-size: 1.1rem;
  font-weight: 600;
  background: linear-gradient(
    135deg,
    var(--primary) 0%,
    var(--secondary) 100%
  );
  border: none;
  border-radius: var(--border-radius);
  color: white;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  margin-top: 8px;
}

.btn-block::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  transition: left 0.5s;
}

.btn-block:hover::before {
  left: 100%;
}

.btn-block:hover {
  background: linear-gradient(
    135deg,
    var(--primary-dark) 0%,
    var(--secondary-dark) 100%
  );
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-block:active {
  transform: translateY(0);
  box-shadow: var(--shadow);
}

.auth-alt {
  margin-top: 24px;
  text-align: center;
  font-size: 0.95rem;
  color: var(--gray-600);
  padding: 20px;
  background: var(--gray-50);
  border-radius: var(--border-radius);
  border: 1px solid var(--gray-200);
}

.checkbox-group {
  margin-top: 16px;
}

.checkbox-item {
  margin-bottom: 12px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px;
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.checkbox-item:hover {
  background: rgba(79, 70, 229, 0.03);
}

.checkbox-item input[type="checkbox"] {
  margin: 0;
  width: 20px;
  height: 20px;
  accent-color: var(--primary);
  cursor: pointer;
  flex-shrink: 0;
  margin-top: 2px;
}

.checkbox-item label {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--gray-700);
  cursor: pointer;
  flex: 1;
}

.checkbox-item.terms {
  margin-top: 20px;
  padding: 16px;
  background: rgba(79, 70, 229, 0.05);
  border: 1px solid rgba(79, 70, 229, 0.1);
}

.checkbox-item.terms label a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  position: relative;
}

.checkbox-item.terms label a::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--primary);
  transition: width 0.3s ease;
}

.checkbox-item.terms label a:hover {
  color: var(--primary-dark);
}

.checkbox-item.terms label a:hover::after {
  width: 100%;
}

.form-text {
  font-size: 0.85rem;
  color: var(--gray-500);
  margin-top: 8px;
  display: block;
  line-height: 1.4;
  padding: 8px 12px;
  background: var(--gray-50);
  border-radius: var(--border-radius-sm);
  border-left: 3px solid var(--gray-300);
}

/* Loading state */
.btn-block:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.btn-block:disabled:hover {
  transform: none;
  box-shadow: var(--shadow);
}

/* Form validation styles */
.form-control.error {
  border-color: var(--danger);
  box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.1);
}

.form-control.success {
  border-color: var(--success);
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.1);
}

.error-message {
  color: var(--danger);
  font-size: 0.85rem;
  margin-top: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.error-message i {
  font-size: 0.9rem;
}

.success-message {
  color: var(--success);
  font-size: 0.85rem;
  margin-top: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.success-message i {
  font-size: 0.9rem;
}

/* Enhanced focus indicators for accessibility */
.form-control:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.checkbox-item input[type="checkbox"]:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.btn-block:focus-visible {
  outline: 2px solid var(--primary-light);
  outline-offset: 2px;
}

/* Responsive design */
@media (max-width: 640px) {
  .auth-container {
    margin: 40px auto;
    max-width: 90%;
    box-shadow: var(--shadow-lg);
  }

  .auth-header {
    padding: 32px 24px 0;
  }

  .auth-header h1 {
    font-size: 2rem;
  }

  form {
    padding: 0 24px 32px;
  }

  .form-control {
    padding: 14px 16px;
    font-size: 16px; /* Prevents zoom on iOS */
  }

  .btn-block {
    padding: 14px 20px;
    font-size: 1rem;
  }

  .checkbox-item {
    padding: 8px;
  }

  .checkbox-item.terms {
    padding: 12px;
  }
}

@media (max-width: 480px) {
  .auth-container {
    margin: 20px auto;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
  }

  .auth-header {
    padding: 24px 20px 0;
  }

  .auth-header h1 {
    font-size: 1.75rem;
  }

  form {
    padding: 0 20px 24px;
  }

  .form-group {
    margin-bottom: 20px;
  }

  .auth-alt {
    padding: 16px;
    font-size: 0.9rem;
  }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  .auth-container {
    background: rgba(15, 23, 42, 0.95);
    border-color: var(--gray-700);
  }

  .auth-header h1 {
    background: linear-gradient(
      135deg,
      var(--primary-light) 0%,
      var(--accent) 100%
    );
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  .auth-header p {
    color: var(--gray-300);
  }

  .form-group label {
    color: var(--gray-200);
  }

  .form-control {
    background: rgba(30, 41, 59, 0.8);
    border-color: var(--gray-600);
    color: var(--gray-100);
  }

  .form-control:focus {
    background: rgba(30, 41, 59, 0.95);
  }

  .form-control::placeholder {
    color: var(--gray-500);
  }

  .auth-alt {
    background: rgba(30, 41, 59, 0.5);
    border-color: var(--gray-600);
    color: var(--gray-300);
  }

  .checkbox-item.terms {
    background: rgba(79, 70, 229, 0.1);
    border-color: rgba(79, 70, 229, 0.2);
  }

  .form-text {
    background: rgba(30, 41, 59, 0.5);
    border-left-color: var(--gray-500);
    color: var(--gray-400);
  }
}